cc : Use transform node data to determine which transform wins at commit

cc/trees/layer_tree_impl.h

Index: cc/trees/layer_tree_impl.h
diff --git a/cc/trees/layer_tree_impl.h b/cc/trees/layer_tree_impl.h
index 48bb194e7c267b897dff9c0ac05d3ffed8d73717..7c97b75baf85a02df710bc71e41f434befa1c0f1 100644
--- a/cc/trees/layer_tree_impl.h
+++ b/cc/trees/layer_tree_impl.h
@@ -164,6 +164,7 @@ class CC_EXPORT LayerTreeImpl {
   void RemoveFromElementMap(LayerImpl* layer);
 
   void AddToOpacityAnimationsMap(int id, float opacity);
+  void AddToTransformAnimationsMap(int id, gfx::Transform transform);
 
   ElementLayers GetMutableLayers(uint64_t element_id);
   int source_frame_number() const { return source_frame_number_; }
@@ -519,6 +520,7 @@ class CC_EXPORT LayerTreeImpl {
   std::unordered_map<uint64_t, ElementLayers> element_layers_map_;
 
   std::unordered_map<int, float> opacity_animations_map_;
+  std::unordered_map<int, gfx::Transform> transform_animations_map_;
 
   // Maps from clip layer ids to scroll layer ids.  Note that this only includes
   // the subset of clip layers that act as scrolling containers.  (This is